Thermodynamic and kinetic study of synthesised graphene oxide-CuO nanocomposites: A way forward to fuel additive and photocatalytic potentials

Renewable superhydrophobic materials have attracted great attention due to their extensive applications in the fields such as cost‐effective and biodegradable oil/water separation field. Herein, we reported an eco‐friendly and facile methodology to develop the superhydrophobic cellulosic paper by immersion method using the ethanol solution of stearic acid. Furthermore, the treated cellulosic papers showed super‐hydrophobicity with water contact angle (WCA) above 153°. Interestingly, this method can realize superhydrophobic‐hydrophilic conversion by simply adjusting the temperature and is amenable for different substrates and with the WCA of 114‐162°. More importantly, the utilization of fluorinated reagents has been avoided, thereby minimizing the production cost and improving safety and environmental aspects. Meanwhile, the modified natural cellulosic paper is applied for oil–water separation, and its separation efficiency was as high as 95% after 10 cycles, indicating the good reusability of stearic acid modified filter papers. Consequently, this simple strategy based on the stearic acid immersion method thus provided an easy conversion of superhydrophobic‐hydrophilic interface and provided facile strategies for conversion of commercial quantitative filter paper to functional materials for oil/water separation.

Section: Methodsmentioning

confidence: 99%

Fabrication of the superhydrophobic natural cellulosic paper with different wettability and oil/water separation application

Yun

Tong

Wang

et al. 2020

“…In recent years, novel composites [1][2][3] , polymers, 4 and catalysts 5 have been widely studied and applied in virous fields thanks to their superb properties. Among these materials, due to preferable properties like high strength and stiffness, excellent corrosion resistance, good biocompatibility and radiolucency, polyether-ether-ketone (PEEK) has been widely used in industrial and medical fields [6][7][8] .…”

Section: Introductionmentioning

confidence: 99%

Investigating the effect of water‐mixing nitrogen atmospheric pressure plasma jet on polyether‐ether‐ketone and time stability under different conditions

Liu

Guan

Shen

et al. 2021

Possessing excellent properties including good biocompatibility, high strength, and stiffness, polyether-ether-ketone (PEEK) has significant application values in medical and industrial fields. However, the relatively poor wettability and low adhesion limit its further applications. Atmospheric pressure plasma jet (APPJ) has been utilized for adjusting PEEK properties, but better hydrophilization effect and time stability after treatment are still urgently needed. In this paper, we employ a water-mixing nitrogen (N 2 H 2 O) APPJ to process PEEK, and surface wettability can be effectively improved (contact angle~18 within 2 min, distance between sample and nozzle outlet: 10 mm) without inducing obvious microstructure damages. Additionally, after storing for 40 days, the sample treated by N 2 H 2 O APPJ also possessed better wettability (~54) compared with that treated by N 2 APPJ (~65). On the basis of this lowdamage and high-efficient modification method, we perform aging experiments under different conditions (different temperatures 25, −10 C; and low vacuum condition: 50 kPa) to determine a relatively optimum storing condition for this method. The experiment results indicate that low temperature and vacuum are conducive to retaining the plasma-induced wettability (~34). The treatment method and storing conditions for PEEK presented here may facilitate the application of PEEK in various fields.

“…3 Due to lithium deposition and dendrite growth during charge/discharge cycles, leakage, and flammability of liquid electrolytes, [4][5][6][7] LIBs with traditional nonaqueous liquid electrolytes possess numerous shortcomings and potential safety hazard, such as short lifetime, low Coulombic efficiency, firing, and explosive. [8][9][10][11][12] Therefore, in order to solve the above problems, polymer electrolytes have become the research hotspot in recent years. Owing to the good affinity between the polymer electrolyte and lithium metal, lithium metal can be used as the anode, which can greatly improve the energy density of the battery.…”

Section: Introductionmentioning

confidence: 99%

“…However, traditional LIBs cannot meet the higher requirements of various energy‐consuming devices for energy storage equipment 3 . Due to lithium deposition and dendrite growth during charge/discharge cycles, leakage, and flammability of liquid electrolytes, 4–7 LIBs with traditional nonaqueous liquid electrolytes possess numerous shortcomings and potential safety hazard, such as short lifetime, low Coulombic efficiency, firing, and explosive 8–12 . Therefore, in order to solve the above problems, polymer electrolytes have become the research hotspot in recent years.…”

Section: Introductionmentioning

confidence: 99%

Semi‐interpenetrating gel polymer electrolyte based on PVDF‐HFP for lithium ion batteries

Luo

Shao

Yang

et al. 2020

Poly(vinylidene fluoride-co-hexafluoropropylene) (PVDF-HFP)-based gel polymer electrolyte (GPE) is considered one of the promising candidate electrolytes in the polymer lithium ion battery (LIB) because of its free standing, shape versatility, security, flexibility, lightweight, reliability, and so on. However, the pristine PVDF-HFP GPE cannot still meet the requirement of large-scale LIBs and other electrochemical devices due to its relatively low ionic conductivity and deterioration of mechanical strength caused by the incorporation of organic liquid electrolyte into the polymer matrix as well as high cost. In order to overcome above deficiencies of PVDF-HFP based GPE, ultraviolet (UV)curable semi-interpenetrating polymer network is designed and synthesized through UV-irradiation technique, and the as-prepared semi-interpenetrating matrix is constituted by pentaerythritol tetracrylate polymer network and PVDF-HFP. The ionic conductivity of the optimized GPE is as high as 5 × 10 −4 S/cm and electrochemical window is up to 4.8 V at room temperature. Especially, the LIB prepared by GPE shows the high initial discharge specific capacity of 151 mAh/g at 0.5 C and good rate capability. Therefore, the semi-interpenetrating GPE based on PVDF-HFP exhibits a promising prospect for the application of rechargeable LIBs.